tolong bantuannya,pleasee..

no 1 : DIT luas : (6×rusuk×rusuk)=6×12×12=864
volume : (rusuk×rusuk×rusuk) : 12×12×12 : 1728

1. luas perm=6.12^2=6.144=864
volume=12x12x12=1728
2.banyaknya = 5.(1,5m.1,5m/20cm.20cm)
3. luas permukaan balok=p.l+2.p.t+2.l.t
20.15+2.20.9+2.15.9
300+360+270
=930